Jig



Juiy 28, 1925.

A. M. LOFLAND JIG ' 2 Sheecs-Sheet 2 v Filed Jan. 20, 19 21 jo'p Patented July 28, 1925.

UNITED STATES PATENT OFFICE.

ALFRED M. LOFLAND, OF LEBANON, INDIANA, ASSIGNOR OF ONE-HALF TO LEWIS C. WILLIS, OF INDIANAPOLIS, INDIANA.

JIG.

Ap lication filed January 20, 1921. Serial No. 438,693.

To all whom it may concern:

Be it known that I, ALFRED M. LOFLAND, a citizen of the United States, residing at Lebanon, in the county of Boone and State of Indiana, have invented certain new and useful Improvements in Jigs, of which the following is a full, clear, and exact description.

The invention which constitutes the subject-matter of this application relates to a jig, and while it is particularly adapted to enable holes to be drilled in the flanges of metal wheel hubs and metal driving flanges for hubs, nevertheless it may be employed for other purposes.

One of the important objects of my invention is to provide a single jig which is adapted to drill holes not only in the flange of the front and rear hubs, but also to drill corresponding holes in the driving flange ordinarily used on the rear hub and axle. In other words, the single jig which I have devised is capable of being employed in the manufacture of one or more sets of metal hubs and metal driving flanges, thus doing away with the necessity of having a complete jig for every particular set of hubs and flanges, much less for every piece of work. This assures that the holes drilled in the flanges of the hubs and in the driving flange for each set or a number of sets will be uniform and properly aligned with each other, thus greatly facilitating the; manufacture and assembly of the parts. Furthermore, it is important that .the holes in the flanges of any particular hub should be in exact alignment with each other and my invention also contemplates improvements for accomplishing this result.

Other objects and advantages of the invention will appear from the detailed description below, taken in connection with the accompanying drawings in which: [Figure 1' is a cross-sectional view of the invention taken on the line AA of Figure 2,-showing its use with one type of steel wheel hub for the front axle; v I Figure 2 is a top plan view of the jig;

' Figure 8 is a detail view taken on the line BB of Figure 2;

Figure4 is a cross sectional view showing the application of theinvention to a rear hub of another type of wheel and its driving flange, the former being illustrated in dottedand the latter in fulllines.

Referring to the drawings in detail and with particular reference to Figures 1 to 3, the numeral 10 designates the base of the jig provided with a plurality of uprights or ahgning posts 11, the lower ends of which are tapered and extend through tapered perforations in the base plate and secured thereto, in the form shown, by dowels 12. It will be noted that the uprights or posts 11 project a substantial distance below the base 10 to provide supports 13. Cooperatlng with the base plate 10 is a removable upper plate 14 provided with a plurality of perforations, the number and position of which, in the form shown, correspond exactly to the number and position of the tapered perforations in the base plate. These perforations in the upper plate 14 enables it to be readily assembled in operative relation to the base plate 10 with the uprights 11 extending therethrough, as clearly shown in Figures 1 and 3.

In Figures 1 to 3 is illustrated one form of metal hub 15, located between the base and upper members 10 and 14. For clamping said hub between said members the following mechanism is preferably employed. One of the plates, preferably the base plate 10, is provided with adjustablev posts 16 to which one of the ends of links 17 is pivoted and adapted to be swung into and out of the slots 18 in the upper'plate 14. The other end of the links above said plates are provided with levers 19 having the ends 20 eccentrically pivoted to said links in such a way that when moved to the position indicated in Figure 1, the eccentric ends 20 engage the upper surface of the plate 14, thereby clamping the work between said base and said upper members 10 and 14. Obviously when the lovers 19 are moved in the opposite direction, the links '17 may be withdrawn from the slots '18, the upper plate 14 removed and the work taken out. As Will benoted from Figures 1 and 3, the

construction is preferably such that the up- I rights. 11 project upwardly a substantial distance'above the upper plate 14 to provide supports 21 corresponding to supports ,13 below the base member 10.

The base and upper'plates are respectively provided with perforations 22 and 23, preferably corresponding to each other in number and location to receive bushings 24 and 25 serving as guides for a suitable drill ing toolremployedto drillholes through the flanges 26 and 27 of the hub 15.

To enable the escape of the boring-chips or shavings, the respective flanges or the work to be operated upon lmustbe-sp-aced slightly from the plates 10 and 14. In the form shown, fixed pins 28 and 29 are proavided for this ,purpose (see Fig. 3) in the respective plates 10 andl i. These pinsalso take the longitudinal thrust of the plates 10 and 14 when the WOIk'lSClZImPB'Cl therebetween.

The pins are'forcedor screw threaded into correspondingly shaped holes formed in the plates, but any'other method may be employed to anchoror secure said pins to said plates. The proper alignment of the work is taken care of byvirtueof the fact that the central openings 30-and 31 the plates coincide with the external diameter onconfiguration if the wo rk which passes through said openings.

Inl igure & is illustrated-the adaptioinof the inventionto-a modified formofhub and its drivingflange 32. The former is illustratedin dottedlines and the latter in full lines. The adaption of=the device-to the driving flange will=firstbe considered. In this case an abutment member 33 for the driving flange'32 partially enters and is rigidly secured-in the central opening 31.0f the upper plate and is provided witha downwardlyprojecting centering stud 34t1adapted toenter the aXle opening 35 of-said driving flange 32. The central-opening 30 of the base plateis alsoprovide'd with an abutment member 36 having "an upwardly projecting centering stud 37 also adapted to enter" the opening 35 ofthedriving'flange. Studs 3a andf37 fit the opening 35 snugly, thereby enabling the proper positioning and alignmentof the driving flange in the ig.

The hub 38, illustrated in Figure L4 in dotted lines, is provided with laterally projecting flanges 39 and 4.0. One end' ll of the hub is centered by its partial'entrance into the centralopening in the top plate 14:,but asthe other end of theih'ub terminates at the laterally projecting flange 39, and as it is alsolarger than the central opening in .the base plate '10, Iprovidethe abutment member36 with.aiperipheral 'groove or depression 42, thereby enabling --.it to telescope slightly lbut sufliciently. into the hub to center the latter. The partial entrance of the abutment. 33 intol the opening: 31 enables: the jig to' be employed :with the abutment atta lied without interfering :witha the use 1 of the jigfor the'hubi 38. w

The reference numeral l3 inaall the figures designates bracings :for .the flanges of. the hubs cast :there with'. To assure thatrthe worlzis properly positionediin the jig zIyemploy a spring pressed. member 4A. adapted. to engage one of the bracing members. 43.

also be in alignment.

From the foregoing it will be seen that my improved form of jig lends itself to the front hub, to the rear hub and to the driving flange of said rearhub. lhen'the jig isemployed lforthe front hub of the type illustrated, the abut-ments 33 and 36 are omitted.

lVhen it is employed for the form of rear hub shown, the abutment 36 only is used in conjunction therewith, when it is employed for the hub flange shown, both the abut ments 33 and 36are used;

As previously stated, theconstruction-of the j ig illustrated in Figu1'e 1; is specifically designed for use in the manufacture of the fronthub employed on one type of car, and the formillustrated in Figure 4 illustrates the use of this jig for ahub flangetand hub used onanother car, the only difference beingthat the central openingsin-the plates differ in size. It will be readily apparent, however, that one jig may be-designed'rthat will take care of any particular set ofhubs and hub flange and a that by; proper construe tion and designing for the niaximum and minimum sizes of hubs an'd flan'ges in actual use, two or three jigs it canfbeemploy-ed to take care of practicallyv anysize of hub-desired by the selection of proper types ,of abutments 33 and 36 r and suitable bushings (not shown) to increase or diminish the sizes of the openings30 and '31. l

In operation,assuming the assembly .of the work hasi been. effected, the drilling tools are caused to enter the bushings in one plate to drill'the holes inone flange afterwhich the jig is reversed and:the drilling ofithe holes in i the other flange is effected in i like fashion. This assures that thesdrillingrtools enters one flange in exact:.alignment with the holes already drilled intthe otheryiflange which might not otherwise be the. casewhere the two flanges are drilled fromone direction only. due to the fact that thetflangelrer mote from theudrilling tool iscsemelthree inches from the latter and whichywouldibe required tofirst penetrateca herdscalesun face, thus tending invariably jiDO throwssaid toolout :of line. a i

It will thus be readilyiapparentthat as the drill openings in thegbushings24t,ingthe base plate and the; bushings 25 in} the upper plate are inexact alignmentwitheach other, the holes drilled intheiflanges of -,the hubs and in the rear hub drivingflangewill not only be of the samedimensions,dentv will Likewise a the: :lloles for receiving the aligning 1 posts .ll areialso in exact alignment; in, fact the construction of the device is such thatthe assemblyiof the base and upper members 10 and'LlfLLlPon the posts 11 resultsin the alignment of the bushings 2a with the bushing, 25.

Thave, illustrated .and described herein specific COllStIllCtlOIlSQf a jig; capable of-interchangeable use for different pieces-pf and scope of my invention as defined by the annexed claims.

VV'hat I claim is:

1. A jig comprising a lower and an upper member removably secured to each other for holding the work, said members provided with a plurality of aligned tool receiving bushings, means for maintaining said bushings in alignment and projecting through each of said members for supporting the jig from either end whereby the jig may be reversed so that the projections through one member form the base when drilling therethrough and the projections through the other member form the basev when drilling through it.

2. A jig comprising a lower member and an upper member removably secured to said lower member, said members being provided with central perforations therein to receive and align the work, a plurality of tool receiving bushings in each member, the bushings in one member being in alignment with those in the other member, means for maintaining said bushings in alignment and projecting through each of said members for supporting the jig from either end whereby the jig may be reversed so that the projections through one member form the base when drilling therethrough and the projections through the other member form the base when drilling through it.

3. A jig comprising a lower member and an upper member removably secured to said lower member, said members being provided with central perforations therein to receive and align the work, a plurality of tool receiving bushings in each member, the bushings in one member being in alignment with those in the other member, means permanently secured to one of said members for maintaining said bushings in alignment and projecting through each of said members for supporting the jig from either end whereby the jig may be reversed so that the projections through one member form the base when drilling therethrough and the projections through the other member form the base when drilling through it.

4. A jig comprising a lower and an upper member removably secured to each other for holding the work, tool receiving bushings in said members, means for maintaining said bushings in a definite position one relative to the other and projecting through each of said members for supporting the jig from either end whereby the jig may be reversed so that the projections through one member formthe base when drilling therethrough and the projections through the other member form the base when drilling through it.

5. A jig comprising a lower member and an upper member removably secured to each other for holding the work and each provided with a plurality of aligning postperforations therein, a plurality of tool receiving bushings in said members, the bushings in one member adapted to be aligned with the bushings in the other member, means for maintaining said bushings in alignment comprising a plurality of aligning posts the lower ends of which are secured in the perforations in the lower member and over the upper ends of which the perforations in the upper member are adapted to telescope, and means carried by the lower member and cooperating with the upper member for drawing said members towards each other for clamping the work between them.

6. A jig comprising a lower member and an upper member removably secured to each other for holding the work and each provided with a plurality of aligning post perforations therein, means for maintaining said members in proper alignment comprising a plurality of aligning posts passing through said perforations and mechanism adjustably attached to one of said members and provided with means cooperating with the other member for drawing said members towards each other for clamping the work between them. V

In testimony whereof, I have hereunto set my hand this 15th day of January, 1921.

ALFRED M. LOFLAND. 

